1. Hábitos Alimentarios De Los Españoleshttp://www.jstor.org/stable/24364469?seq=1#fndtn-page_scan_tab_contents
2. The influence of gender, age, education and household size on meal preparation and food shopping responsibilities
3. National Statistics Institute (INE, Spain)http://www.ine.es/jaxiT3/Tabla.htm?t=1433
4. World Report on Ageing and Healthhttp://apps.who.int/iris/bitstream/10665/186463/1/9789240694811_eng.pdf?ua=1
5. Personas mayores;Pérez-Llamas,2013